Congratulations, Jay... But I'm with Stressbaby- this doesn't bode well for keeping my plant collection small.
I've been feasting on delicious jackfruit all summer (Mexican-grown ones are $1.69 a pound here in Colorado) and I've been planting the seeds to use for grafting practice. I've intended to toss the plants when I'm done torturing them; I really don't have the room to fruit a jackfruit tree.
But now I have a dozen multi-rootstock jackfruit plants from my grafting practice and I too am tempted to find a dwarf cultivar to graft on just to see if I can grow one. I've been eyeing the 'Ziman Pink' cultivar which is supposedly dwarf, tasty, and might be different enough from what I can get in the store to justify growing it. (I have a standard rule of not growing anything I can get in a decent form in a local store-- it helps keep my collection at a more reasonable size.)
If anyone up north would like a multi-rootstock jackfruit seedling, PM me and I can send one your way... I need to get rid of the majority of them before freezing temperatures hit in 6-8 weeks.
Kevin